The Sig Sauer P320 Spectre Comp Blackout in this configuration is a striker-fired 9mm with a 4.6-inch threaded barrel, optic-cut slide, and 21+1 capacity. Two 21-round steel body magazines are included. Weight is 41.8 oz (2.6 lbs). 
 

Key Specifications 

• Brand: Sig Sauer 
• Model: P320 Spectre Comp Blackout 
• Caliber: 9mm Luger (9x19 Para) 
• Barrel Length: 4.6 inches 
• Capacity: 21+1 rounds 
• Finish: Black Cerakote 
• Weight: 41.8 oz (2.6 lbs) 
• Action Type: Semi-Automatic 
   

Features 

Two 21-round steel body magazines are included, giving you significant capacity before a reload. The optic-cut slide lets you mount a red dot directly without an adapter plate. XRAY3 Day/Night sights provide a usable iron sight picture under the optic and work in low light independently. The threaded barrel accepts a suppressor or compensator. The XSeries flat trigger offers a straight-face pull. The P320's modular design means the FCU can be moved to different grip modules if you want to change frame size later.

The P320 Spectre Comp Black with 21-round capacity draws consistent praise for reliability and performance, with the smooth trigger and manageable recoil being the most cited strengths. The optic-ready feature is popular. Buyers appreciate the ability to add a red dot without additional hardware.

The slide aesthetics and grip design are well-received among shooters who want a distinctive look alongside functional performance. Ergonomics are comfortable for long range sessions.

The gun is on the heavier side for its class, which is a consistent point of concern for carry-focused buyers. Price is a frequent topic. Those who find it justified point to the feature set and Sig's build quality; others feel it's elevated relative to comparable options. The modular P320 trigger system gets admired for flexibility but draws occasional criticism from shooters who prefer a more traditional action feel. Customer service experiences with Sig Sauer vary across user reports.